I just installed a new 12 tooth renthal front chainwheel and it is so awesome! When I got it new last year it just embarrassing to ride at the track especially if the track was real sandy in the turns, and on jumps out of turns etc. So first I did the pink wire and it really opened up the throttle and it was very noticeable. Still the X just felt like just lacking for a tight track. Instead of going into expensive upgrades, I found renthal makes a 12 tooth for my bike and bought it for about 20 bucks on amazon. When I first went throught the gears on my little private track, It felt like I was on a red fire breathing dragon that ate unicorns and laughed about it, compared to what it was before. I cant tell if I lost any top end ( but i know i have because of the gear ration)by feel but as far as getting down,it does it well. Thank you renthal for making my regret for not getting the R go away. I nope this helps the decision making for anyone looking for a way to really improve ur ride without spending alot of money.